One Simple Walking Change May Help Older Adults Reverse Frailty

Roughly 70 Percent of Brisk Walkers Improved Frailty Status, Versus 46 Percent of Casual Walkers

Frailty, the slow slide into weakness, exhaustion, and sluggish walking that can come with age, is often approached as something exercise can slow but rarely undo. A new clinical trial found that older adults who walked briskly had nearly triple the odds of moving to a milder frailty category compared with those who strolled at a comfortable pace.

Published in PLOS One, the study followed 105 older adults living in retirement communities near Chicago, all of whom were frail or close to it. Both groups walked on the same schedule, and only the effort changed. After 16 weeks, the brisk walkers had done better on usual walking speed, six-minute walking distance, and daily steps.

Earlier research showed exercise can prevent or delay frailty, but proof that existing frailty could be reversed was lacking. Researchers behind the trial call this the first study to show that high-intensity walking can do it. A large number of participants dropped out, though, which weakens confidence in the result.

Brisk Walkers Worked Their Hearts Harder on an Identical Schedule

Fourteen independent living communities around Chicago were randomly assigned to a walking program, and one withdrew. Assigning whole communities, not individual residents, kept neighbors from watching a group walk at a different pace. Participants were never told a second pace existed.

Of 215 residents screened, 165 enrolled. Participants were at least 60, could walk at least 10 feet with no more than moderate help, and had no uncontrolled heart, metabolic, kidney, or breathing disease that limited exercise. Frailty was scored with a quick tool that checks grip strength and asks about tiredness, appetite, trouble with stairs or long walks, and activity level.

Three times a week for 45 minutes over 16 weeks, each participant walked the hallways and stairwells alongside a research assistant. Casual walkers kept a relaxed pace. Brisk walkers aimed for about 70 percent of their estimated maximum heart rate. Because 72 percent of participants took medications that can blunt heart rate, effort was also judged by how hard the walk felt. Averaged across sessions, brisk walkers reached 71 percent of maximum heart rate and casual walkers reached 59 percent.

Brisk Walking Nearly Tripled the Odds of Improving Frailty Status

Results covered 105 people, 47 brisk walkers and 58 casual walkers, who averaged 79 years old and ranged from 62 to 96. About 79 percent were women, 75 percent were white, and roughly two-thirds used a cane, walker, or similar device. At the start, 41 percent were frail and 59 percent were pre-frail, an earlier warning stage.

Among 102 people with complete frailty data, 32 of 46 brisk walkers (about 70 percent) moved to a milder category, compared with 26 of 56 casual walkers (about 46 percent). By the end, half the brisk walkers no longer counted as frail or pre-frail, versus roughly 27 percent of casual walkers. The gap is reported as odds, which is not quite the same as being three times as likely.

Everyday mobility improved too. Brisk walkers sped up their usual walking pace more and improved by about 160 feet more than casual walkers on a six-minute walking test. Among 87 people with enough thigh-monitor data, brisk walkers averaged 496 more steps a day after the program than before it, from starting averages between 3,700 and 3,800, while casual walkers averaged 488 fewer. Balance, timed-walk, and general physical performance scores showed no clear difference between groups. One proposed explanation is that faster walking demands more from the heart and lungs, building reserves that gentle strolling may not.

One Injury-Free Fall Was the Only Definite Walking-Related Event

Across 3,354 sessions, a single health event was judged definitely related to the program: a fall in the brisk group that caused no injury. Thirteen serious health events, nine in the casual group and four in the brisk group, were all judged unrelated to walking. A few episodes of knee, back, or leg pain were rated probably or possibly related and appeared in both groups.

Brisk Walking’s Frailty Advantage Shrank After Accounting for Dropouts

Of 165 people who enrolled, 60 never reached the final analysis, and losses were heavier among brisk walkers, at 34 of 81 (42 percent) compared with 26 of 84 (31 percent) casual walkers. Those who left tended to be slightly older with weaker physical function at the start. When researchers adjusted for the missing participants, the brisk walkers’ odds advantage shrank to roughly 1.5 to 1.7 times and fell short of the usual statistical threshold, meaning chance could not be ruled out. Even so, the team maintains the effect was still large enough to matter clinically.

Walking faster may help reverse frailty, and this trial gives the field good reason to test the idea in bigger studies. Participants also chose their own speed, and the authors speculate that a plain instruction to walk fast may be easier to follow than exercise-guideline jargon. Results apply only to supervised sessions in retirement communities, though, which leaves open whether vigorous walking is safe or effective for frail adults on their own.

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Disclaimer: This article summarizes one study and is not medical advice. Anyone with frailty or health concerns should consult a doctor before starting vigorous walking.

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